6.2 Medium
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:P/RL:T/RC:C
0.0004 Low
EPSS
Percentile
9.1%
Successful exploitation of this vulnerability could allow attackers with access to the project file to recover previous - yet unprotected - versions of the project, without the knowledge of the know-how protection password.
The following products from Siemens are affected:
3.2.1 PROTECTION MECHANISM FAILURE CWE-693
The know-how protection feature in affected products does not properly update the encryption of existing program blocks when a project file is updated. This could allow attackers with access to the project file to recover previous - yet unprotected - versions of the project without the knowledge of the know-how protection password.
CVE-2023-30757 has been assigned to this vulnerability. A CVSS v3 base score of 6.2 has been calculated. The CVSS vector string is (CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N).
Eli Biham, Sara Bitan, Alon Dankner, Arnon Lazerson, and Assaf Rosenbaum from the Faculty of Computer Science, Technion Haifa reported this vulnerability to Siemens.
Siemens has identified the following specific workarounds and mitigations users can apply to reduce risk:
For further inquiries on security vulnerabilities in Siemens products and solutions, please contact the Siemens ProductCERT.
As a general security measure, Siemens recommends protecting network access to devices with appropriate mechanisms. To operate the devices in a protected IT environment, Siemens recommends configuring the environment according to Siemens’ operational guidelines for industrial security and following recommendations in the product manuals.
Additional information on industrial security by Siemens can be found on the Siemens industrial security webpage.
For more information see the associated Siemens security advisory SSA-042050 in HTML and CSAF.
CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. CISA reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.
CISA also provides a section for control systems security recommended practices on the ICS webpage at cisa.gov/ics. Several CISA products detailing cyber defense best practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.
Additional mitigation guidance and recommended practices are publicly available on the ICS webpage at cisa.gov/ics in the technical information paper, ICS-TIP-12-146-01B–Targeted Cyber Intrusion Detection and Mitigation Strategies.
Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents.
No known public exploits specifically target this vulnerability. This vulnerability is not exploitable remotely.
cert-portal.siemens.com/productcert/csaf/ssa-42050.json
cert-portal.siemens.com/productcert/html/ssa-42050.html
cisa.gov/ics
cisa.gov/ics
cwe.mitre.org/data/definitions/693.html
new.siemens.com/global/en/products/services/cert.html#SecurityPublications
nvd.nist.gov/vuln/detail/CVE-2023-30757
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support.industry.siemens.com/cs/mdm/109742284?c=87347935883
support.industry.siemens.com/cs/mdm/109755202?c=105012867723
support.industry.siemens.com/cs/mdm/109764516?c=105012867723
support.industry.siemens.com/cs/mdm/109773506?c=126979557387
support.industry.siemens.com/cs/mdm/109798671?c=132780438283
support.industry.siemens.com/cs/mdm/109815056?c=132780438283
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